@article{DAN_1958_123_4_a5,
     author = {E. M. Landis},
     title = {Relationship between the growth of the solution of an elliptical equation and the number of its sign alternations},
     journal = {Doklady Akademii Nauk},
     pages = {602--605},
     publisher = {mathdoc},
     volume = {123},
     number = {4},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_123_4_a5/}
}